You have just said my mind here, I think I have heard about this before that the extent of how successful you are going to be in the future determine the stash of Bitcoin in your possession,
You have to be very specific with your words or be more clear when passing information as it might be misleading when consumed.
Life is too complex to be centered around bitcoin only, one can be financially free with bitcoin which is one of the reason Satoshi created it in the first place but bitcoin does not guarantee success life. bitcoin is safer investment than every other assets that it could be compared to because it guarantees return in a long term but perhaps it's very much inconvenient to say that the percentage of your bitcoin position will determine the your success in your life.
The as for Bitcoin guaranteeing good life? No, nothing is guaranteed in this life, something can happen very fast that can change the cause of so many things, we that are investing in it are doing so because we believe in it due to it track record and the it potential it has.
Investment in bitcoin in my opinion does not only lay in its potentials of return but it also a fact that the bitcoin community believes in bitcoin for its original nature of being a currency with the real definition of money rather than just a tool for profit.